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| Glossary |
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What is SEER? EER? HSPF?
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ENERGY STAR
Earning the ENERGY STAR means a product meets strict energy efficiency guidelines set by the U.S. |
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| ENERGY STAR air conditioners use advanced heat transfer technologies that transfer more of the heat from the air into the coils. This saves on the amount of energy required to compress the refrigerant. ENERGY STAR Air Conditioners exceed minimum federal standards for energy consumption by at least 15%. |
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| Air conditioners are one of the appliances given ENERGY STAR ratings. Energy Star Air Conditioners feature high-efficiency compressors, fan motors and heat transfer surfaces. |
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| Air conditioners use a blower to pull heat and moisture from the room air through a filter, cool and dehumidify it, and then return the air to the room. |
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| All air-conditioners need to be mounted in a window or through an opening in a wall because they expel hot air. |
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| A new energy-saver feature cycles the compressor off and on more efficiently, reducing the operating costs. |
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The main difference from other types of air conditioner is that a window/ room air conditioner is a single, self- contained unit with an evaporator or cooling coils, a condenser, and refrigerant-filled tubing all assembled in one box. |
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Features to look for are three-speed fan controls which allow the adjustment of the amount of cool air (and noise!) the unit produces, and digital thermostats that are more precise and easy to use. Some air conditioners also feature timers on the unit to predetermine time to come on, thease units are not controlled only the temperature of the room. |
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| British thermal unit (BTU or Btu) is a traditional unit of energy equal to about 1.06 kilojoules. |
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| Energy Efficiency Ratio (EER) |
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| Seasonal Energy Efficiency Ratio (SEER) |
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is a measure of how efficiently a cooling system will operate when the outdoor temperature is at a specific level (95F).
EER is the heat energy removal (cooling capacity) by the product measured in BTUH divided by WATTS. This ratio is expressed in BTUH/ WATTS.
The EER approximates the unit's operating cost as compared to similar models. The Higher the EER number, the more efficient the air conditioner is rated and the less it will cost to operate. |
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is most commonly used to measure the efficiency of a central air conditioner.
It measures how efficiently a cooling system will operate over an entire season. The higher the SEER, the more efficient the air conditioner.
SEER is a measure of the total cooling of a central air conditioner or heat pump (in BTU) during the normal cooling season as compared to the total electric energy input (in watt-hours) consumed during the same period. |
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| Air conditioner sizes are often given as "tons" of cooling where 1 ton of cooling is defined as being equivalent to 12,000 BTU/h. |
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Both SEER and EER are included in the ENERGY STAR specification because each rating indicates the energy efficiency of the product under different operating modes. SEER rating more accurately reflects overall system efficiency on a seasonal basis, EER reflects the system’s energy efficiency at peak day operations. Both ratings are important when choosing an air conditioner. |
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Heat Seasonal Performance Factor (HSPF) is the most commonly used measure of a heat pumps heating efficiency. HSPF represents the total heating output of a heat pump (including supplementary electric heat) during the normal heating season (in BTU) as compared to the total electricity consumed (in watt-hours) during the same period. |
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Energy saving tip- Maintenance - all air conditioners have filters that need to be cleaned periodically. For easy maintenance, choose one that has a slide-out filter. Keeping the filter clean will save energy and money. |
Article by John Wesley Froberg |
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Article ID: 6268 |
Last updated: 02 Nov, 2009 |
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Views: 1338
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Comments: 0
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Air Conditioner: Noise during operation
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Window AC cool but not removing humidity
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